Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning
ISBN 10: 1133949649
ISBN 13: 978-1-13394-964-0

Chapter 5 Principles of Chemical Reactivity: Energy and Chemical Reactions - Study Questions - Page 217d: 66

Answer

a) this is an exothermic process as liquid water is cooled to convert into ice (solid state). b) this is an endothermic reaction as formation of water from hydrogen and oxygen involves more energy to break the bonds to form new ones. c) this involves cooling of water, and that is an exothermic process. d) this involves breaking of hydrogen bonding between water molecules which requires energy, so it is an endothermic process.
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